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Examination of Initialization Techniques for Nonnegative Matrix Factorization

Frederic, John
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Abstract

While much research has been done regarding different Nonnegative Matrix Factorization (NMF) algorithms, less time has been spent looking at initialization techniques. In this thesis, four different initializations are considered. After a brief discussion of NMF, the four initializations are described and each one is independently examined, followed by a comparison of the techniques. Next, each initialization's performance is investigated with respect to the changes in the size of the data set. Finally, a method by which smaller data sets may be used to determine how to treat larger data sets is examined.

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Date
11/21/2008
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Research Projects
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Keywords
Nonnegative matrix factorization, Initialization, Spherical K- means, Compression ratio, Percent error, Random Acol, Random C
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